|Name|Parentage|Size|Flower colour|Flower type|
|---|---|---|---|---|
|Cornish Snow|cuspidata × saluenensis|04.0m²|white|single|
|Cornish Spring|cuspidata × saluenensis|04.0m²|pink|single|
|Francie L|reticulata × saluenensis|64.0m²|rose-pink|double|
|Freedom Bell|× williamsii|06.5m²|red|semi-double|
|Inspiration|reticulata × saluenensis|10.0m²|rose-pink|semi-double|
|Leonard Messel|reticulata × saluenensis|16.0m²|rose-pink|semi-double|
|Royalty|japonica × reticulata|01.0m²|light red|semi-double|
|Spring Festival|× williamsii, cuspidata|10.0m²|pink|semi-double|
|Tom Knudsen|japonica × reticulata|06.3m²|deep red|double paeony|
|Tristrem Carlyon|reticulata|10.0m²|rose pink|double paeony|

Question: how many cultivars are the colour "rose-pink?"
Answer: 4